150 PERLIDES. 



27. PERLA ABDOMIXALIS. 



Magna ; caput et prothorax omnino nigra ; prothorax magnus, ca- 

 pitis latitudine ; venae fuscce ; abdomen fulvum, fusco-obscu- 

 rum ; setce caudales alls non occultce. 



Perla abdominalis, Burm. Handb. Ent. ii. 881, 14. Schceff. Icon. 

 Ins. Ratisb. p. 160, f. 2, 3. Pictet, Hist. Nat. Neur. Perl. 204, 

 18, pi. 16, f. 57. Guer. Icon. Regne Anim. Texte, 394. 



28. PERLA BARCINONENSIS. 



Perla Barcinonensis, Ramb. Hist. Nat. Ins. Neur. 454, 10. 

 Barcelona. 



29. PERLA MADRITENSIS. 



Perla Madritensis, Ramb. Hist. Nat. Ins. Neur. 455, 11. 

 Madrid. 



30. PERLA BCETICA, 



Perla Boetica, Ramb. Hist. Nat. Ins. Neur. 455, 12. 

 Malaga. 



31. PERLA CAPITATA. 



Parva ; caput jflavum, macula valde distincta nigra; thorax nigri- 

 cans ; prothorax maynus, capitis latitudine ; abdomen fulvum, 

 fusco-obscurum ; vena fuscce. 



Perla capitata, Pictet, Hist. Nat. Neur. Perl. 214, 23, pi. 18, f. 4, 5. 

 United States. 



32. PERLA COULONII. 



Maxima ; caput macula nigra bene determinata ; prothorax mag- 

 nus, capitis latitudine ; abdomen fere thoracis colore ; vena 

 fusees. 

 Perla Coulonii? Pictet, Hist. Nat. Neur. Perl. 212, 22, pi. 10, f. 4. 



a, b. District watered by the Mackenzie and Slave Rivers. Pre- 

 sented by Sir J. Richardson. 



